File: position-sticky-scrollIntoView.html

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<!DOCTYPE html>
<title>Scrolling to sticky position elements uses their unshifted position</title>
<link rel="help" href="https://www.w3.org/TR/css-position-3/#stickypos-scroll" />
<meta name="assert" content="This test checks that scrolling to sticky position elements uses their initial position" />

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<style>

h1 {
  position: sticky;
  background: #ddd;
  border: 1px solid black;
  top: 0px;
  bottom: 0px;
}

section {
  height: 100vh;
}
</style>

<body>
  <h1>Title 1</h1>
  <section></section>
  <h1>Title 2</h1>
  <section></section>
  <h1>Title 3</h1>
  <section></section>

<script>
test(() => {
  window.scrollTo(0, 0);
  const element = document.querySelectorAll('h1')[2];
  element.scrollIntoView();
  assert_approx_equals(document.scrollingElement.scrollTop, element.offsetTop, 1);
}, 'scrolling a sticky element into view should use its unshifted position');
</script>
</body>